Optical feedthrough for pressure vessels

Details Optical feedthrough for pressure vessels Optical feedthrough for pressure vessels

1979-10-17

1982-11-23

Hill, Rolf G.

350 9620, G02B 514

Patent

active

043602495

ABSTRACT:
Each of two optical fibers to be mated is cemented to one end of a respective quarter-pitch segment of graded-index rod, at the axis of the rod. The opposite end of each of the two quarter-pitch segments is polished flat, perpendicular to the axis. The two polished ends are faced toward each other and held in precise parallelism, but not necessarily touching, by a suitable connector housing. An optical signal from one optical fiber is collimated by its attached graded-index rod segment for transmission across the gap to the other rod, which in turn focuses the parallel rays onto the receiving tip of its attached optical fiber.
A planar window, such as a pressure window of a deep-underwater craft, may be interposed between the two sides of the connector without disturbing performance.

REFERENCES:
patent: 3825320 (1974-07-01), Redfern
patent: 3829195 (1974-08-01), Rawson
patent: 3951515 (1976-04-01), Allard
patent: 4119362 (1978-10-01), Holzman
patent: 4183618 (1980-01-01), Rush et al.
K. Kobayashi et al. "Micro-Optics Devices for Branching, Coupling, Multiplexing and Demultiplexing" in Conf. on Integrated Optics and Optical Fiber Communication paper B11-3, 1977 IOOC.

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